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From: Carlo Arenas <carenas@gmail.com>
To: "René Scharfe" <l.s.r@web.de>
Cc: Johannes Schindelin <Johannes.Schindelin@gmx.de>,
	git@vger.kernel.org, avarab@gmail.com, gitster@pobox.com,
	michal.kiedrowicz@gmail.com
Subject: Re: [RFC PATCH v5 0/3] grep: almost no more leaks, hopefully no crashes
Date: Sat, 10 Aug 2019 05:40:46 -0700
Message-ID: <CAPUEsph+hjU2UstL=YW-2qKC3pGJrOwaw+VCiHH74HZ2=oupig@mail.gmail.com> (raw)
In-Reply-To: <d8e55007-27bd-fcac-c918-bb712ec1bb8b@web.de>

On Sat, Aug 10, 2019 at 12:57 AM René Scharfe <l.s.r@web.de> wrote:
>
> Am 10.08.19 um 05:05 schrieb Carlo Arenas:
> > in macOS (obviously testing without NED) the following is the output
> > of (a hacked version) of p7801 for maint (against chromium's
> > repository), with René's patch on top
>
> Do you mean p7820?  And what did you change?  Looking at the results you
> removed basic and extended from the list of regex engines, right?

correct, that was a weird typo there; apologize for the confusion.
you were correct about my changes; ironically, I didn't spell those
changes out to avoid confusion.

> Ugh, cloning https://chromium.googlesource.com/chromium/src.git sends
> more than 16GB across the wire.  Is that even the right repository?

noticed it was mentioned before by people[1] doing performance testing
on grep specifically and
thought it was better than try to come with another one, the linux
kernel wouldn't work in macOS
because it breaks "run" as it fails to checkout in a case insensitive
filesystem.

> Not
> sure if my machine can keep the relevant parts cached while grepping --
> I/O times could drown out any difference due to context allocation and
> memory allocator choice.  Let's see...

;), try setting /proc/sys/vm/swappiness to 0 or get more RAM

> I don't understand why my performance is lower by factor 2.5 than yours
> for all perl regex tests except 7820.15 (your 7820.4), where my system
> is two times faster.  Debian Testing, GCC 9.1.0, i5-9600K, 16GB RAM.

interesting; did you also see at most 100% of one CPU being used?
yours seem to be faster than mine so this might be representative of
single threaded performance.

> Anyway, nedmalloc is slower across the board, but the impact of my
> patch is in the noise.  Right?

yes, and there is a lot of noise.

Carlo

[1] https://public-inbox.org/git/e72330c6747218545cce1b6b1edfd1e448141a8f.1563570204.git.matheus.bernardino@usp.br/

  reply	other threads:[~2019-08-10 12:41 UTC|newest]

Thread overview: 67+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-05 11:51 [PATCH 0/1] Fix a problem with PCRE2 and nedmalloc, found via Azure Pipelines Johannes Schindelin via GitGitGadget
2019-08-05 11:51 ` [PATCH 1/1] pcre2: allow overriding the system allocator Johannes Schindelin via GitGitGadget
2019-08-05 16:19   ` Carlo Arenas
2019-08-05 16:27     ` Carlo Arenas
2019-08-05 19:32       ` Johannes Schindelin
2019-08-05 19:26     ` Johannes Schindelin
2019-08-05 21:53     ` Junio C Hamano
2019-08-06  6:24       ` Carlo Arenas
2019-08-06  8:50       ` [PATCH 0/3] grep: no leaks (WIP) Carlo Marcelo Arenas Belón
2019-08-06  8:50         ` [PATCH 1/3] grep: make PCRE1 aware of custom allocator Carlo Marcelo Arenas Belón
2019-08-08 13:54           ` Johannes Schindelin
2019-08-08 15:19             ` Carlo Arenas
2019-08-06  8:50         ` [PATCH 2/3] grep: make PCRE2 " Carlo Marcelo Arenas Belón
2019-08-08 13:56           ` Johannes Schindelin
2019-08-08 14:32             ` Carlo Arenas
2019-08-06  8:50         ` [PATCH 3/3] grep: avoid leak of chartables in PCRE2 Carlo Marcelo Arenas Belón
2019-08-06 16:36         ` [RFC PATCH v3 0/3] grep: no leaks or crashes (windows testing needed) Carlo Marcelo Arenas Belón
2019-08-06 16:36           ` [RFC PATCH v3 1/3] grep: make PCRE1 aware of custom allocator Carlo Marcelo Arenas Belón
2019-08-06 16:36           ` [RFC PATCH v3 2/3] grep: make PCRE2 " Carlo Marcelo Arenas Belón
2019-08-07  5:38             ` René Scharfe
2019-08-07  9:49               ` Carlo Arenas
2019-08-07 13:02                 ` René Scharfe
2019-08-07 13:08                   ` [PATCH 1/2] nedmalloc: do assignments only after the declaration section René Scharfe
2019-08-07 13:09                   ` [PATCH 2/2] nedmalloc: avoid compiler warning about unused value René Scharfe
2019-08-08  2:35                   ` [RFC PATCH v3 2/3] grep: make PCRE2 aware of custom allocator Carlo Arenas
2019-08-08  7:07                     ` René Scharfe
2019-08-08 12:38                       ` Carlo Arenas
2019-08-08 14:29                         ` René Scharfe
2019-08-08 20:18                           ` Johannes Schindelin
2019-08-07 18:15                 ` Junio C Hamano
2019-08-06 16:36           ` [RFC PATCH v3 3/3] grep: avoid leak of chartables in PCRE2 Carlo Marcelo Arenas Belón
2019-08-06 16:48           ` [RFC PATCH v3 0/3] grep: no leaks or crashes (windows testing needed) Junio C Hamano
2019-08-07 21:39           ` [RFC PATCH v4 " Carlo Marcelo Arenas Belón
2019-08-07 21:39             ` [RFC PATCH v4 1/3] grep: make PCRE1 aware of custom allocator Carlo Marcelo Arenas Belón
2019-08-07 21:39             ` [RFC PATCH v4 2/3] grep: make PCRE2 " Carlo Marcelo Arenas Belón
2019-08-07 22:28               ` Junio C Hamano
2019-08-07 21:39             ` [RFC PATCH v4 3/3] grep: avoid leak of chartables in PCRE2 Carlo Marcelo Arenas Belón
2019-08-09  3:02             ` [RFC PATCH v5 0/3] grep: almost no more leaks, hopefully no crashes Carlo Marcelo Arenas Belón
2019-08-09  3:02               ` [RFC PATCH v5 1/3] grep: make PCRE1 aware of custom allocator Carlo Marcelo Arenas Belón
2019-08-09  3:02               ` [RFC PATCH v5 2/3] grep: make PCRE2 " Carlo Marcelo Arenas Belón
2019-08-27  9:07                 ` Johannes Schindelin
2019-08-27 11:51                   ` Carlo Arenas
2019-10-03  5:02                     ` Junio C Hamano
2019-10-03  8:08                       ` Johannes Schindelin
2019-10-03 11:17                         ` Carlo Arenas
2019-10-03 18:23                           ` Johannes Schindelin
2019-10-03 22:57                           ` Junio C Hamano
2019-08-09  3:02               ` [RFC PATCH v5 3/3] grep: avoid leak of chartables in PCRE2 Carlo Marcelo Arenas Belón
2019-08-09 11:24               ` [RFC PATCH v5 0/3] grep: almost no more leaks, hopefully no crashes Carlo Arenas
2019-08-09 17:01                 ` René Scharfe
2019-08-09 17:46                   ` Junio C Hamano
2019-08-09 21:26                   ` Johannes Schindelin
2019-08-10  3:03                     ` [PATCH] SQUASH Carlo Marcelo Arenas Belón
2019-08-10  7:57                       ` René Scharfe
2019-08-10  8:42                         ` Carlo Arenas
2019-08-10 19:47                           ` René Scharfe
2019-08-12  7:35                             ` Carlo Arenas
2019-08-12 12:14                               ` René Scharfe
2019-08-12 12:28                                 ` Carlo Arenas
2019-08-10 13:57                       ` Johannes Schindelin
2019-08-10  3:05                     ` [RFC PATCH v5 0/3] grep: almost no more leaks, hopefully no crashes Carlo Arenas
2019-08-10  7:56                       ` René Scharfe
2019-08-10 12:40                         ` Carlo Arenas [this message]
2019-08-10 21:16                           ` René Scharfe
2019-08-08 20:21           ` [RFC PATCH v3 0/3] grep: no leaks or crashes (windows testing needed) Johannes Schindelin
2019-08-09  6:52             ` Carlo Arenas
2019-08-09 21:13               ` Johannes Schindelin

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